????js?????????????js??

????js(JavaScript)???????????????JavaScript???????????HTML?????У??????js????????????С???????Web??????,???????????????????????????,????????????????????Ч????????????????????????????????????,JavaScript????д????????????????????????

????ECMAScript??js????????????????????????????????????

????1. DOM??Document Object Model???? ???????????????????????????????????

????javascript???

????2.BOM(Browser Object Model) : ????????????, ??????????????н?????????????

????DOM ??BOM ???????API??Application Programing Interface????

????style

????body